As a person who was alive at the time of the crazay pantsuit, I can tell you why they had a sudden "popularity". Prior to approximately 1968, girls were not allowed to wear pants to school. They were required to wear dresses or skirts. When social pressure finally forced schools to allow girls to wear pants, there were hideous restrictions, such that no jeans were allowed ONLY PANT SUITS. I was ten years old and HATED those freakin pantsuits, but by god I acquired two of them.